97172570826 has 96 divisors (see below), whose sum is σ = 232369300800. Its totient is φ = 29218641408.

The previous prime is 97172570797. The next prime is 97172570851. The reversal of 97172570826 is 62807527179.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 694525 + ... + 822623.

It is an arithmetic number, because the mean of its divisors is an integer number (2420513550).

Almost surely, 2^97172570826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97172570826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116184650400).

97172570826 is an abundant number, since it is smaller than the sum of its proper divisors (135196729974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97172570826 is a wasteful number, since it uses less digits than its factorization.

97172570826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128228 (or 128225 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 97172570826 in words is "ninety-seven billion, one hundred seventy-two million, five hundred seventy thousand, eight hundred twenty-six".